A Sharpie is every car person's best friend! Anyone who has black trim or wheels should have a Sharpie in their garage. I use them for touching up the hard top and black wheel lugs.@viper88
Any and all brand / kind of lug nuts you use power tools on will get nicks/gouges and then comes the rust.... kinda comes with the territoriality so to speak. Keep them touched up, clean and protected if you are concerned about rust...
And yes, even with hand tools you have to be real careful and even then can get a nick.. if I were to see a nick I would touch up with a Sharpie, etc..